Chapter 88-18.1 Construction8.1.1 Specifications, Control Mechanisms and Functions 0017-5468iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iT-8-18.1.2 Major Components 0017-5469iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iF-8-1Item Function/MethodFixing method by fixing film + pressure rollerFixing heater Unitary flat heater incorporating both main heater and sub heaterFixing temperature detection [1] Main thermistor (TH1): Temperature control and fault detection[2] Sub thermistor (TH2): Fault detection[3] Thermo-switch (TP1): Fault detectionFixing temperature control [1] Warm-up temperature control[2] Normal temperature control[3] Sheet-to-sheet temperature controlProtection functions [1] Detection of error in temperature control by thermistor[2] Detection of temperature rise by thermo-switchFixing drive control Speed control by detecting fixing film rotation[1] Inner delivery roller [4] Pressure roller[2] Fixing film speed sensor SR202 Fixing delivery sensor[3] Fixing film unit M201 Fixing drive motor[2][3][1][4]M201SR202